In the context of de Broglie-Bohm pilot-wave theory, violations of the Born
rule are allowed and can be considered as describing nonequilibrium
distributions. We study the effects of interactions on quantum relaxation
towards equilibrium for a system of one-dimensional coupled harmonic
oscillators. We show by numerical simulations that interactions can delay or
even prevent complete relaxation for some initial states. We also discuss how
this effect might be relevant for cosmological scenarios and how nonequilibrium
could be detected in some models.

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